One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,6,4,7)(9,10)(11,16)(12,14)(13,15)(17,18)(19,21)(20,24)(22,23)(25,26)(27,29)(28,30)(31,32)(1,3,5,4)(2,6,8,7)(9,11)(10,12)(13,14)(15,16)(17,19)(18,20)(21,23)(22,24)(25,26,28,30)(27,29,31,32)(11,14)(12,16)(17,20,22,21)(18,19,23,24)(25,27,28,31)(26,29,30,32)(1,2)(3,6)(4,7)(5,8)(9,10)(11,16)(12,14)(13,15)(17,21,22,20)(18,19,23,24)(25,26)(27,29)(28,30)(31,32)(1,4,5,3)(2,7,8,6)(9,12,13,16)(10,14,15,11)(17,19)(18,20)(21,23)(22,24)(25,27)(26,29)(28,31)(30,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.